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interfacing between PIC18F and Transceiver CC1101

 
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pierokun



Joined: 18 Apr 2011
Posts: 1

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interfacing between PIC18F and Transceiver CC1101
PostPosted: Mon Apr 18, 2011 4:06 am     Reply with quote
hi everyone,

I need some help with my study project at University. I have to make interface between Microcontroller PIC18F and Transceiver CC1101, using CCS compiler C.
Now, I found a lot of datasheet about CC1101, some examples of sources code with other PIC or MCU, but i'm very blocked because of SPI interface.

Someone can help me please?! If I can't initialize SPI Pins, I couldn't communicate with CC1101.

I tried that :
Code:

#use spi(BAUD=9600,MASTER, DI=PIN_C4, DO=PIN_C5, CLK=PIN_C3, BITS=8, MSB_FIRST, MODE=0, ENABLE=PIN_A3)

and my definition of Pins is :

Code:
#define SCK PIN_C3   // is connected to SCLK of CC1101  <--> RC3/SCK/SCL of PIC18F
#define MISO PIN_C4    // is connected to SO of CC1101  <--> RC4/SDI/SDA of PIC18F
#define MOSI PIN_C5    // is connected to SI of CC1101  <--> RC5/SDO of PIC18F
#define CSn PIN_A3    // is connected to CSn of CC1101  <--> RA3 of PIC18F

I saw that some people use this:
Code:
 
setup_spi(SPI_MASTER | SPI_L_TO_H | SPI_CLK_DIV_4 );

But don't know if it is good.

I'm really SAD. I try to visualize signal SCK or SO on oscilloscope, but nothing appears.

Please help........ :(

My thanks in advance.
temtronic



Joined: 01 Jul 2010
Posts: 9246
Location: Greensville,Ontario

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PostPosted: Mon Apr 18, 2011 5:03 am     Reply with quote
CCS kindly supplies a few examples in the examples folder, which is a good place to start!
Your code of ...use spi(baud=9600...) is NOT how SPI is configured!
While SPI is a serial form a of communication, it's speed is not setup using baud=nnnn.
Again several examples of SPI are provided by CCS.
SPI is a very simple serial interface and the CCS functions make using it easy.
You should 'google', CCS C code and CC1101 to see if there are any 'hits'. Unless you're the very first one using the two, there's probably a few hundred or thousands of hits!
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